The Influence of Reynolds Number on the Performance of Turbomachinery

Abstract
The over-all duty of a turbomachine with respect to fluid-friction effects is measured by the machine Reynolds number, UD/ν. Experimental data are presented for several types of turbomachines which show the variation in over-all efficiency with UD/ν when all other dimensionless parameters are held constant. The results are conclusive for the ranges of data reported, and should be useful to design, application, and operating engineers confronted with unfamiliar UD/ν values.

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